Honorable

My mom moved up from her old celeron desktop to my sister's old laptop that is some dual core intel processor, but she has not noticed any improvement with her video editing. So she wants a new computer, that can run video editing programs, such as pinnacle, good. Although I can not decide between a i5 or an i7 for the video editing. Mainly the choice is between the intel core i5 3570k and the intel core i7 3770k. Will there be much of a difference for the extra 100 bucks? And also two more things: Is 7,200 rpm hardrive sufficient for video editing? And Is the intel hd 4000 graphics good enough for video editing, or should I buy a discrete graphics card such as a gt 620(60$) or something? Thanks

Splendid

The i7 is better for that, if the program doesn't support GPU accelerated encoding, but if the program does support GPU accelerated encoding, either one would be fine, due to being able to use Quick Sync with the HD 4000 iGPU.

When encoding, HD 4000 is much faster than anything a cheap discreet card can do.

But to answer your last question completely, no, you don't need to buy a discreet GPU. The only ones that would even come close to the HD 4000's encoding speed are very high end.